<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Title</title>
</head>
<style>
  .red{
    color: red;
  }
  .fontSize{
    font-size: 100px;
  }
</style>
<body>
<div id="app">
  <!-- v-bind 数组语法 -->
  <p :class="[arg1,arg2]">{{message}}</p>
</div>


<script src="../js/vue.js"></script>
<script>
  // 1.创建Vue的实例对象
  const app = Vue.createApp({
    data(){
      return {
        message: '你好Vue3！',
        arg1: 'red',
        arg2: 'fontSize'
      }
    }
  }).mount('#app');
</script>
</body>
</html>